Percentage & Tip Calculator

Use this free percentage calculator to instantly calculate tips, discounts, percentage changes, and bill splits. Whether you need to figure out a restaurant tip, a sale discount, or split a bill among friends, this tool handles it all in one place.

How to use this Percentage & Tip calculator

This calculator has four tools in one. Select the tab for the calculation you need:

Tip Calculator: Enter the bill amount, the tip percentage you want to leave, and the number of people splitting the bill. Click Calculate Tip to see the tip amount, total bill, and exactly how much each person owes.

Discount: Enter the original price and the discount percentage. Click Calculate Discount to see how much you save and what the final sale price is.

Percentage: Enter any percentage and any number to find out what that percentage of the number equals. For example, enter 15% and 200 to find that 15% of 200 is 30.

% Change: Enter an original value and a new value to calculate the percentage increase or decrease between them. Useful for comparing prices, scores, salaries, or any two numbers over time.

Frequently asked questions

Q: How much should I tip at a restaurant?
A: The standard tip in the United States is 15% to 20% for sit-down restaurant service. A 15% tip is considered acceptable for average service, 18% to 20% for good service, and 20% or more for excellent service. For takeout orders, a tip of 10% to 15% is appreciated but not always expected. For delivery, 15% to 20% of the order total is standard, with a minimum of $3 to $5 for small orders.

Q: How do I calculate a percentage without a calculator?
A: The easiest method is to find 10% first by moving the decimal point one place to the left, then multiply or divide from there. For example, 10% of $65 is $6.50. So 20% is $13.00, and 15% is $6.50 plus half of $6.50 which is $9.75. This mental math trick works well for estimating tips quickly at a restaurant.

Q: What is the formula for percentage change?
A: Percentage change = ((New Value - Original Value) / Original Value) × 100. If the result is positive, it is a percentage increase. If negative, it is a percentage decrease. For example, if a price goes from $80 to $100, the change is ((100 - 80) / 80) × 100 = 25% increase.

Q: How do I split a bill unevenly?
A: This calculator splits the bill evenly among the number of people you enter. If some people ordered more than others, manually calculate each person's share of the food total first, then use this tool to calculate the tip on the full bill amount and divide the tip evenly — since tipping is typically based on total service, not individual orders.

Q: How do I calculate what percentage one number is of another?
A: Divide the part by the whole and multiply by 100. For example, if you scored 42 out of 50 on a test, divide 42 by 50 to get 0.84, then multiply by 100 for 84%. You can use the Percentage tab in this calculator to do this automatically.